<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>
<table width="500" border="2" align="center">
    <caption>环保工程季度数据报表</caption>
    <thead style="background: #c0c4cc">
    <tr>
        <th>季度</th>
        <th>销量</th>
    </tr>
    </thead>
    <tbody style="background:#5FB878">
    <tr>
        <th>一季度</th>
        <th>12</th>
</tr><tr>
        <th>二季度</th>
        <th>11</th>
    </tr><tr>
        <th>三季度</th>
        <th>13</th>
    </tr>
        <th>四季度</th>
        <th>12</th>
    </tr>
    </tbody>
    <tfoot style="background: rosybrown">
    <tr>
        <th>季度平均工程数量</th>
        <th>12</th>
</tr><tr>
        <th>总计</th>
        <th>48</th>
    </tr>
    </tfoot>

</table>
</body>
</html>